• ENVIRONMENT: basinal reef at aphotic depth (200 m or more). The frame-building corals have a bushy growth form and were mound forming. They provided excellent habitats and feeding grounds for a large and diverse benthic invertebrate fauna. Brachiopods, bivalves, echinoids, asteroids, serpulids, solitary corals, octocorals and moulds of decapods and gastropods are recorded everywhere in the Faxe Formation (Fig. v). However, the degree of preservation is extremely variable.